46% recycled polyester / 46% polyester / 8% spandex

Total Forefoot Height: 34

100% Merino wool - 125 gm2

Rib-knit cuff traps heat and stays put

COROS Heart Rate Monitor Jakob Ingebrigtsen Edition Hat 46% recycled polyester / 46%HRM JAK Comfortable and simpler to wear than a chest strap. Easy to adjust the fit and remove the sensor for quick cleaning. Our latest multi channel optical sensor for precise measurement. Up to 3 simultaneous connections with Bluetooth enabled devices. Wear detection allows for automatic device pairing for new workouts. 38 hours of full operation or 80 days in standby mode on a single charge. Rechargeable with a magnetic USB charging cable.